TW201832499A - Uploading a user device on a shared communication medium - Google Patents

Abstract

In an embodiment, a device (eg, an eNB) calls the UE in a shared communication. The device obtains paging messages for transmission to UEs with different coverage levels. The device transmits an extended shared ePDCCH, followed by a paging ePDCCH, followed by repeated transmission of paging messages on a plurality of PDSCH sub-frames. In a further embodiment, the device obtains a first set and a second set of paging messages for transmission to different paging groups. The device establishes a non-overlapping POW for the first and second paging groups to avoid paging ePDCCH collisions.

Description

Call user equipment on shared communication media

This patent application claims the benefit of U.S. Provisional Application No. 62 / 462,212, entitled "PAGING FOR MULTEFIRE WITH COVERAGE ENHANCEMENT", filed on February 22, 2017, which was assigned to the assignee of this case , The entire content of which is hereby expressly incorporated by reference.

Generally speaking, the content of this case is about telecommunications technology, and more specifically, the content of this case is about operations on shared communication media.

Wireless communication systems are widely deployed to provide various types of communication content such as voice, data, multimedia, and the like. A typical wireless communication system is a multiplexed access system capable of supporting communication with multiple users by sharing available system resources (eg, bandwidth, transmission power, etc.). Examples of such multiplexed access systems include code division multiplexed access (CDMA) systems, time division multiplexed access (TDMA) systems, frequency division multiplexed access (FDMA) systems, orthogonal frequency division multiplexed memory Access (OFDMA) system and others. These systems typically follow best practices such as Long Term Evolution (LTE) provided by the 3rd Generation Partnership Project (3GPP), Ultra Mobile Broadband (UMB) and Evolution Information provided by the 3rd Generation Partnership Project 2 (3GPP2) (EV-DO), 802.11 and other specifications provided by the Institute of Electrical and Electronics Engineers (IEEE).

In a cellular network, "macrocell" access points provide connectivity and coverage to a large number of users in a geographic area. The macro network deployment was carefully planned, designed, and implemented to provide good coverage in this geographic area. To improve indoor or other specific geographic coverage (such as for residential and office buildings), the deployment of additional "small cells" (usually low-power access points) has recently begun to complement conventional macro networks. Small cell access points can also provide increased capacity growth, a richer user experience, and more.

For example, small-cell LTE operations have been extended into unlicensed spectrum, such as the Unlicensed National Information Infrastructure (U-NII) band used by wireless local area network (WLAN) technology. This extension of small cell LTE operation is designed to increase spectral efficiency and thus increase the capacity of the LTE system. However, it may need to co-exist with the operation of other radio access technologies (RATs) that typically use the same unlicensed band, most notably the IEEE 802.11x WLAN technology commonly referred to as "Wi-Fi".

One embodiment relates to a method for uploading a user equipment (UE) on a shared communication medium, including the steps of: obtaining a set of paging messages for transmission to a paging group including a set of UEs associated with different coverage levels; transmission sharing Enhanced Physical Downlink Control Channel (ePDCCH), transmitting the shared ePDCCH opens a POW with a duration extended from a traditional paging occurrence window (POW) used by one or more conventional UEs; after the transmission of the shared ePDCCH Transmitting a paging ePDCCH; and repeatedly transmitting the set of paging messages on a plurality of PDSCH sub-frames according to the paging ePDCCH.

Another embodiment relates to a method for calling a UE on a shared communication medium, including the following steps: obtaining a first set of paging messages for transmission to a first paging group including the first set of UEs; obtaining a second set of paging messages Transmitting to a second paging group including a second set of UEs; establishing a non-overlapping paging occasion window (POW) for the first and second paging groups to avoid paging ePDCCH collisions.

Another embodiment relates to a device configured to call a UE on a shared communication medium, comprising: means for obtaining a set of paging messages for transmission to a paging group including a set of UEs associated with different coverage levels; and Means for transmitting a common ePDCCH, transmitting the common ePDCCH enabling a POW having a duration extended from a conventional POW used by one or more conventional UEs; means for transmitting a paging ePDCCH after transmission of the common ePDCCH; and A component that repeatedly transmits the set of paging messages on a plurality of PDSCH sub-frames according to the paging ePDCCH.

Another embodiment relates to a device configured to call a UE on a shared communication medium, comprising: means for obtaining a first set of paging messages for transmission to a first paging group including the first set of UEs; Means for obtaining a second set of paging messages for transmission to a second paging group including a second set of UEs; and means for establishing a non-overlapping paging occasion window (POW) for the first and second paging groups to avoid Paging ePDCCH collision building block.

Another embodiment relates to an apparatus configured to call a UE on a shared communication medium, including at least one processor, the processor being coupled to at least one transceiver and configured to: obtain a set of paging messages to transmit to a set including A paging group of a set of UEs associated with different coverage levels; transmission of a shared ePDCCH that turns on a POW with a duration extended from a traditional POW used by one or more conventional UEs; after the transmission of the shared ePDCCH Transmitting a paging ePDCCH; and repeatedly transmitting the set of paging messages on a plurality of PDSCH sub-frames according to the paging ePDCCH.

Another embodiment relates to a device configured to call a UE on a shared communication medium, including at least one processor coupled to at least one transceiver and configured to: obtain a first set of paging messages for transmission to A first paging group including a first set of UEs; obtaining a second set of paging messages for transmission to a second paging group including a second set of UEs; and establishing non-overlapping for the first and second paging groups Paging timing window (POW) to avoid paging enhanced physical downlink control channel (ePDCCH) collisions.

Another embodiment relates to a non-transitory computer-readable medium containing instructions stored thereon, which, when executed by a device configured to call a UE on a shared communication medium, cause the device to perform an operation, The instructions include: configured to cause the device to obtain a set of paging messages for transmission to a paging group including a set of UEs associated with different coverage levels, transmit at least one instruction that shares a common ePDCCH, A duration POW of the duration of a conventional POW extension used by one or more legacy UEs; configured to cause the device to transmit at least one instruction to page the ePDCCH after transmission of the shared ePDCCH; and configured to cause the device to perform the paging ePDCCH Repeatedly transmitting at least one instruction of the set of paging messages on a plurality of PDSCH sub-frames.

Another embodiment relates to a non-transitory computer-readable medium containing instructions stored thereon, which, when executed by a device configured to call a UE on a shared communication medium, cause the device to perform an operation, The instructions include at least one instruction configured to cause the device to obtain a first set of paging messages for transmission to a first paging group including a first set of UEs; a second configured to cause the device to obtain a second set of paging messages Set at least one instruction transmitted to a second paging group including a second set of UEs; and at least one configured to cause the device to establish a non-overlapping POW for the first and second paging groups to avoid paging ePDCCH collisions instruction.

Techniques for calling a user equipment (UE) over a radio link sharing a communication medium are disclosed. In one aspect, the radio link may be Long Term Evolution (LTE) in an unlicensed spectrum radio link.

A more specific aspect of the content of the present case is provided in the following description and related drawings relating to various examples provided for illustrative purposes only. Alternative patterns can be designed without departing from the scope of the content of this case. In addition, well-known aspects of the content of this case may not be described in detail or may be omitted so as not to obscure more relevant details.

Those skilled in the art will appreciate that the information and signals described below can be represented using any of a variety of different technologies and techniques. For example, the materials, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the description below may be made of voltage, current, electromagnetic waves, magnetic fields or particles, light fields or particles, or any combination thereof The representations depend partly on the particular application, partly on the desired design, partly on the corresponding technology, etc.

In addition, many aspects are described around, for example, a sequence of actions performed by units of a computing device. It will be appreciated that the various actions described herein may be performed by a specific circuit (eg, an application-specific integrated circuit (ASIC)), program instructions executed by one or more processors, or a combination of the two. Furthermore, for each aspect of the aspects described herein, the corresponding form of any such aspect may be implemented, for example, as a "logical unit that is configured to" perform the described action.

FIG. 1 is a system-level diagram illustrating an exemplary wireless network environment, illustrated by way of example as including a "master" radio access technology (RAT) system 100 and a "contention" RAT system 150. Each system can consist of different wireless nodes that are usually capable of receiving and / or transmitting via a radio link, including information related to various types of communications (eg, voice, data, multimedia services, associated control signalling, etc.) . The main RAT system 100 is shown as including an access point 110 and an access terminal 120 that communicate with each other via a radio link 130. The contention RAT system 150 is shown as including two contention nodes 152 communicating with each other on a separate radio link 132, and the contention RAT system 150 may similarly include one or more access points, access terminals, or other types Wireless node. As an example, the access point 110 and the access terminal 120 of the main RAT system 100 may communicate via the radio link 130 according to Long Term Evolution (LTE) technology, and the contention node 152 of the contention RAT system 150 may be based on Wi-Fi technology Communication occurs via a radio link 132. It will be understood that each system can support any number of wireless nodes distributed throughout a geographic area, and the illustrated entities are illustrated for illustrative purposes only.

Unless otherwise stated, the terms "access terminal" and "access point" are not intended to be specific or limited to any particular RAT. In general, the access terminal can be any wireless communication device that allows users to communicate on the communication network (for example, mobile phones, routers, personal computers, servers, entertainment equipment, Internet of Things (IOT) / Internet of Everything (IOE) -enabled devices, in-vehicle communication equipment, etc.), and may be referred to as user equipment (UD), mobile station (MS), user station (STA), user equipment (UE) in different RAT environments instead )Wait. Similarly, an access point can communicate with an access terminal according to one or more RATs depending on the network in which the access point is deployed, and can be referred to as a base station (BS), network node, node B. Evolved Node B (eNB). Such access points may correspond to small cell access points, for example. "Small cells" typically represent a type of low power access that can include or otherwise be referred to as femtocells, picocells, microcells, wireless local area network (WLAN) access points, other small coverage area access points, etc. point. Small cells can be deployed to complement macro cell coverage, which can cover several blocks within the cell or a few square miles in a rural environment, resulting in improved signal transmission, increased capacity growth, and richer users Experience and more.

Returning to FIG. 1, the radio link 130 used by the primary RAT system 100 and the radio link 132 used by the contention RAT system 150 may operate on the shared communication medium 140. This type of communication medium may consist of one or more frequency, time, and / or space communication resources (eg, including one or more channels across one or more carriers). As an example, the communication medium 140 may correspond to at least a portion of an unlicensed frequency band. Although different authorized frequency bands have been reserved for certain communications (for example, by government entities such as the Federal Communications Commission (FCC) in the United States), some systems, especially those using small cell access points, have Operation extends to unlicensed frequency bands (such as the Unlicensed National Information Infrastructure (U-NII) bands used by WLAN technologies including Wi-Fi).

Due to the shared use of the communication medium 140, there is a possibility of cross-link interference between the radio link 130 and the radio link 132. In addition, some RATs and certain jurisdictions may require contention or "listening before speaking (LBT)" to access the communication media 140. As an example, a Clear Channel Assessment (CCA) protocol can be used, in which each device senses on the shared communication media via media sensing that it has seized (and in some cases retained) the communication media for its own transmission Other traffic for verification. In some designs, the CCA protocol may include different CCA preamble signal detection (CCA-PD) and CCA energy detection (CCA-ED) mechanisms for giving communication media to intra- and inter-RAT traffic, respectively. For example, the European Telecommunications Standards Institute (ETSI) requires all devices to compete for content regardless of the RAT of the device on certain communication media, such as an unlicensed band.

As will be described in more detail below, the access point 110 may include a paging scheduler 121 and the access terminal 120 may include a paging monitoring manager 122. The paging scheduler 121 may be configured to generally schedule paging transmissions as described in more detail below, and the paging monitoring manager 122 may be configured to facilitate reception and decoding of paging messages at the access terminal 120.

FIG. 2 illustrates an exemplary frame structure that may be implemented for the primary RAT system 100 on the communication medium 140 to facilitate contention-based access to the communication medium 140.

The illustrated frame structure includes a series of radio frames (RF) numbered according to the system frame numbering nomenclature (RF _N , RF _{N + 1} , RF _{N + 2,} etc.) and divided into corresponding sub frames (SF). These sub-frames can also be numbered for reference (for example, SF0, SF1, etc.). Each corresponding sub-frame can be further divided into time slots (not shown in FIG. 2), and the time slots can be further divided into symbol periods. As an example, the LTE frame structure includes a system frame divided into 1024 numbered radio frames, each of which consists of 10 sub-frames, each of which together constitutes the system frame period (for example, For a 10 ms radio frame with a 1 ms subframe, it lasts 10.24 s). Moreover, each sub-frame may include two time slots, and each time slot may include six or seven symbol periods. The use of a frame structure can provide more natural and efficient coordination between devices than more self-organizing signal transfer technologies.

Generally, the exemplary frame structure of FIG. 2 may be implemented as a frequency division duplex (FDD) frame structure or a time division duplex (TDD) frame structure. In the FDD frame structure, each sub-frame on a given frequency can be statically configured for uplink (UL) communication for transmitting uplink information from the access terminal 120 to the access point 110 or from the storage The access point 110 transmits downlink information to the access terminal 120 in a downlink (DL) communication. In the TDD frame structure, each sub frame can be used as a downlink (D), uplink (U) or special (S) sub frame at different times to perform different operations. Different arrangements of downlink, uplink, and special subframes can be referred to as different TDD configurations.

In some designs, the frame structure of FIG. 2 may be “fixed” because the position of each sub-frame may be predetermined with respect to absolute time, but in any given case, it is used to access the communication medium 140. Contention procedure, the frame structure may or may not be occupied by the main RAT signalling. For example, if the access point 110 or the access terminal 120 fails to win contention for a given sub-frame, the sub-frame may be muted. However, in other designs, the frame structure of FIG. 2 may be “floating” because the position of each sub-frame can be dynamically determined relative to the point where access to the communication medium 140 is safe. For example, the start of a given frame (eg, RF _{N + 1} ) may be delayed relative to absolute time until the access point 110 or the access terminal 120 can win contention.

As further illustrated in FIG. 2, one or more sub-frames may be designated to include what is referred to herein as Discovery Reference Signaling (DRS). The DRS may be configured to transmit reference signals to facilitate system operation. Reference signal transfer can include timing synchronization, system acquisition, interference measurement (such as radio resource measurement (RRM) / radio link measurement (RLM)), tracking loop, gain reference (such as automatic gain control (AGC) ), Paging, etc. As an example, the DRS may include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) for cell search, a cell-specific reference signal (CRS) for RRM, and a physical broadcast channel (PBCH) for transmitting various access parameters )and many more. This seed, called the DRS Measurement Timing Configuration (DMTC) window defined in or around a designated sub-frame of each radio frame (for example, sub-frame SF0) can be scheduled for this seed The range of the frame (eg, spanning the first six sub-frames SF0 to SF5 of the radio frame) is transmitted periodically (eg, every 10 ms).

For LTE operating in the unlicensed spectrum, paging messages are broadcast on the physical downlink shared channel (PDSCH). The paging message is scheduled via the physical downlink control channel (PDCCH) by allocating resources to the PDSCH. A common paging radio network temporary identifier (P-RNTI) (which is not assigned to any particular UE or UE group) is used for paging. For example, the length of the P-RNTI can be 16 bits, with a fixed value (such as 65534 or 0xFFFE). The paging occasion (PO) sub-frame carrying one or more paging messages can be scheduled by the ePDCCH in the paging occasion window (POW). According to the MulteFire Alliance specification (for example, MulteFire 1.0), the duration of the POW is allowed to reach 10 ms.

In one embodiment, a shared (or non-paging) ePDCCH (which may alternatively be referred to as a CePDCCH) carrying downlink control information (DCI) may be signaled to the UE (eg, in a common search space (CSS) Format 1-C)), and the paging ePDCCH may be used to indicate the time repetition (or multiple locations) of the PDSCH carrying the specific PO sub-frame including the paging message within the POW. In an example, each ePDCCH (eg, shared or paging ePDCCH) may be configured as an intra-transmission opportunity (TxOP) data scheduling ePDCCH or a multi-TxOP data scheduling ePDCCH. Although the ePDCCH can be scheduled using the TxOP data in other embodiments, the following example describes the paging ePDCCH as a multi-TxOP data scheduling ePDCCH. In an example, the p-RNTI can be used to scramble the paging ePDCCH to work as a paging signal for paging message transmission. The paging ePDCCH does not carry the actual paging message, but rather indicates the location where the paging message (eg, PO sub-frame) will appear within one or more TxOPs on the PDSCH. Accordingly, the paging message is scheduled via the paging ePDCCH, and then the paging message is transmitted on the PDSCH with a time-repeated or smaller transport block size (TBS).

UEs usually do not become part of a paging group based on their coverage level, which is why UEs with different coverage levels can be part of the same paging group paged via the same resource (or PO sub-frame) on the PDSCH. The paging ePDCCH can use 1 CSS scrambled with P-RNTI. The paging ePDCCH indicates the maximum repetition levels N _rep and TBS in DCI, which can cover all paged UEs of a particular paging group, regardless of the respective coverage level of each UE. The paging message for each paged UE in the paging group is carried on the same payload of the PDSCH (which can be repeated on _Nrep repeats in the POW). Each UE thinks that it has the worst coverage level in the support paging group (for example, the lowest channel quality that can be based on SNR or any other well-known channel quality metric, which can be reported by the UE to the access point to facilitate the decision of the coding rate). The UE establishes a coding rate (eg, transport block size (TBS)) to monitor the paging ePDCCH. Similar to multi-TxOP data scheduling ePDCCH, as shown in FIG. 3A, the paging ePDCCH can be scheduled to carry repeated paging messages of the current TxOP and (if necessary) the PDSCH in the next TxOP. FIG. 3A illustrates a timing diagram 300 of a paging procedure, where N _rep = 3, two PDSCH sub-frames (or PO sub-frames repeated) carrying a set of paging messages appear in the first TxOP (or 1 TxOP), And another PDSCH sub-frame (or the PO sub-frame repeated) carrying the set of paging messages appears in the second TxOP (or 2 TxOP). FIG. 3B illustrates the same timing chart 300B as the timing chart 300 of FIG. 3A, except that each ePDCCH occupies only a part of the PRB in the corresponding subframe. Therefore, in FIG. 3B, each ePDCCH is separated from the associated PDSCH according to frequency. Each ePDCCH is transmitted on the first set of PRBs, and the PDSCH is transmitted on the second set of PRBs in the same subframe.

In an embodiment, as shown in FIG. 3A, the paging ePDCCH may multiplex with the PDSCH only in time (not frequency). For example, an aggregation level 64 with 3 CSS + 2 UE-specific SSs can occupy 80 physical resource blocks (PRBs). To accommodate paging by UEs with the lowest level of coverage in a particular paging group, longer PDSCH paging repetitions may be required (eg, 8 or more repetitions). Moreover, an interrupt in a particular TxOP may require additional LBT and management burden. As mentioned previously, paging ePDCCH must occur within a maximum of 10 ms POW as defined by MulteFire 1.0. Paging ePDCCH may be difficult to schedule for paging PDSCH with high repetition counts (eg, 8 or more repetitions) without conflicting with ongoing downlink data transmission on PDSCH and waiting to send paging ePDCCH Until the ongoing downlink data transmission can push the paging ePDCCH beyond the upper POW threshold of 10 ms.

Embodiments of the content of this case thus relate to an extended POW. FIG. 4A illustrates a timing diagram 400 illustrating a paging procedure using an extended POW according to an embodiment of the present disclosure. Specifically, the paging ePDCCH is included in the extended part of the extended POW (for example, extended from the traditional POW used by one or more traditional UEs), and one or more paging PDSCH repetitions are allowed to occur in the extended POW Outside.

Referring to FIG. 4A, the access point 110 transmits a common ePDCCH at 405, which turns on POW. The first eight PDSCH sub-frames 410 in the POW are occupied by downlink data transmission, which blocks the transmission of paging messages in any paging PDSCH repetition. After the transmission of the eight PDSCH sub-frames 410, the access point 110 clears the shared communication media via LBT (415-420). Once the purge is complete, the access point 110 to transmit paging ePDCCH (425), a plurality of paging PDSCH repeated subsequent transmission (430) (e.g., based on N _rep paging ePDCCH 425 as indicated in a). As indicated at 435, the operations of 415-430 occur after the traditional POW threshold of 10 ms which should have passed. In an example, the POW can be extended to greater than 10 ms (for example, POW = 10 * M ms, where M is an integer greater than or equal to 2) in order to allow more paging ePDCCH 425 and associated paging PDSCH repetition 430 Great flexibility. As described above for FIGS. 3A-3B, the worst coverage level among UEs to be paged associated with a given POW can be used to establish a TBS and can be used to establish the number of paging repetitions (eg, N _rep ).

FIG. 4B illustrates the same timing diagram 400B as the timing diagram 400 of FIG. 4A, except that each ePDCCH occupies only a part of the PRB in the corresponding subframe. Therefore, in FIG. 4B, each ePDCCH is separated from the associated PDSCH according to frequency, where each ePDCCH is transmitted on the first set of PRBs, and PDSCH is transmitted on the second set of PRBs in the same subframe. Specifically, the sub-frame 405B includes both the shared ePDCCH and the PDSCH on the respective PRBs, and the sub-frame 425B includes both the paging ePDCCH and the PDSCH on the respective PRBs.

FIG. 4C illustrates a paging process 400C according to an embodiment of the present content. In an example, the process of FIG. 4C is performed by an access point such as the access point 110 of FIG. 1. In an example, the process of FIG. 4C may result in timing diagram 400 of FIG. 4A or timing diagram 400B of FIG. 4B.

Referring to FIG. 4C, at block 405C, the access point obtains a set of paging messages for transmission to a paging group including a set of UEs associated with different coverage levels. At block 410C, the access point transmits a common ePDCCH (eg, 405 of FIG. 4A or 405B of FIG. 4B), which opens with a traditional POW extension from one or more legacy UEs (eg, MulteFire 1.0 UE). Duration of POW. At block 415C, the access point transmits a paging ePDCCH after transmission of the ePDCCH at block 410C (eg, 425 of FIG. 4A or 425B of FIG. 4B). At block 420C, the access point repeatedly transmits the set of paging messages on a plurality of PDSCH sub-frames according to the paging ePDCCH (eg, 430 of FIG. 4A or FIG. 4B, which may occur after the POW at 435). In an example, some or all of block 415, block 420C, or both may occur in an extended portion of a POW, that is, after a traditional POW has passed (for example, at 435 in FIGS. 4A-4B) .

Referring to FIG. 4C, as mentioned above, the access point may decide a transport block size (TBS) and the number of repetitions for transmission of the set of paging messages based on the worst coverage level UE in the UE set. Repeated transmission at block 420C may then be performed based on the TBS and the number of repeats. In addition, as shown in FIG. 4B, each ePDCCH (for example, ePDCCH, shared ePDCCH, paging ePDCCH, etc.) can be transmitted on the first set of PRBs, and PDSCH is transmitted on the second set of PRBs in the same subframe. Alternatively, as shown in FIG. 4A, each ePDCCH may be transmitted without a PDSCH in the same subframe.

In a specific DRX period, a traditional MulteFire UE can be divided into different paging frames (PF) based on the UE ID. A PF is a radio frame that can contain one or more PO sub-frames for sending paging messages and system information change notifications for paging. In LTE, for example, the location of the PF used to access the terminal 120 (LTE UE in this example) is defined by certain paging parameters according to the following formula: SFN mod T = (T / N) * (UE_ID mod N ) (Formula 1)

Here, T = min (UE-specific DRX value, DefaultPagingCycle) and represents the minimum DRX cycle as between the UE-specific DRX cycle and a preset cell-specific DRX cycle. At the same time, N = min (T, nB) and represents the number of paging frames in the paging cycle of the UE, where nB = {2T, T, T / 2, T / 4, T / 8, T / 16, T / 32}. Finally, UE_ID = International Mobile Services User Identity (IMSI) mod 1024, and is used as a pseudo-random spacing value. Broadcast the DefaultPagingCycle and nB parameters in the system information (SIB-2).

The extended POW can include multiple PFs. The PF mentioned above may constitute a starting frame for paging, which may be extended according to the extended POW. Paging ePDCCHs for different paging groups may conflict with each other due to LBT, and frequency multiplexing may not be possible as previously described. For example, one paging ePDCCH may have occupied more than 64 PRBs. When POWs for different paging groups overlap, paging collisions (or paging ePDCCH collisions) may occur. FIG. 5A illustrates a paging ePDCCH conflict 500 between paging group # 0 and paging group # 1 according to an embodiment of the content of the present case. 5B illustrates a paging ePDCCH conflict 500B between paging group # 0 and paging group # 1 according to another embodiment of the content of the present case. FIG. 5B is the same as FIG. 5A, except that each ePDCCH occupies only a part of the PRB in the corresponding subframe. Therefore, in FIG. 5B, each ePDCCH is separated from the associated PDSCH according to frequency, where each ePDCCH is transmitted on the first set of PRBs, and PDSCH is transmitted on the second set of PRBs in the same subframe.

FIG. 6A illustrates a timing diagram 600 illustrating a non-overlapping POW according to an embodiment of the present content. In the embodiment of FIG. 6A, the number of starting PFs per DRX period can be reduced to So that the POWs of paging group # 0 and paging group # 1 do not overlap. In addition, in the embodiment of FIG. 6A, the value of nB may be limited to . The corresponding POW of paging group # 0 and paging group # 1 can be set as P sub-frames, . As mentioned above, the paging ePDCCH is sent in the corresponding POW, so separating the 0th and 1st POW as shown in FIG. 6A ensures that the paging ePDCCH for paging group # 0 and paging group # 1 will not be as shown in FIG. 5A -Figure 5B generally conflicts.

FIG. 6B illustrates a timing diagram 600B illustrating a non-overlapping POW according to another embodiment of the present disclosure. FIG. 6B is the same as FIG. 6A, except that each ePDCCH occupies only a part of the PRB in the corresponding subframe. Therefore, in FIG. 6B, each ePDCCH is separated from the associated PDSCH according to frequency, where each ePDCCH is transmitted on the first set of PRBs, and PDSCH is transmitted on the second set of PRBs in the same subframe.

FIG. 6C illustrates a paging process 600C according to an embodiment of the present content. In an example, the process of FIG. 6C is performed by an access point such as the access point 110 of FIG. 1. In an example, the process of FIG. 6C may result in timing diagram 600 of FIG. 6A or timing diagram 600B of FIG. 6B.

Referring to FIG. 6C, at block 605C, the access point obtains a first set of paging messages for transmission to a first paging group that includes the first set of UEs (eg, paging group # 0 in FIGS. 6A-6B) . At block 610C, the access point obtains a second set of paging messages for transmission to a second paging group that includes the second set of UEs (eg, paging group # 1 in FIGS. 6A-6B). At block 615C, the access point establishes a non-overlapping paging occasion window (POW) for the first and second paging groups to avoid paging ePDCCH collisions (eg, as shown in Figures 6A-6B, thereby interleaving POW To avoid paging ePDCCH collisions). In an example, block 615C may establish a non-overlapping POW in part by reducing the number of starting paging frames (PF) for each DRX period.

Although not explicitly illustrated in FIG. 6C, the access point may also transmit the first paging ePDCCH that schedules the first set of paging messages to the first set of UEs in the first POW, and may also transmit the first pPDCCH in the first POW The second transmission schedules the second set of paging messages to the second paging ePDCCH of the second set of UEs. Based on block 615C, the first and second paging ePDCCHs are offset from each other to avoid ePDCCH collisions. In addition, as shown in FIG. 6B, each ePDCCH (eg, the first and second paging ePDCCHs) can be transmitted on the first set of PRBs, and the PDSCH is transmitted on the second set of PRBs in the same subframe. Alternatively, as shown in FIG. 6A, each ePDCCH can be transmitted without a PDSCH in the same subframe.

In an embodiment, the above-mentioned paging agreement may be configured to: extend the MulteFire coverage deployed in an industrial IoT network and / or an automated guided vehicle (AGV) network. For example, some AGVs specify a minimum operating bandwidth of 150 kbps with 3 times the coverage compared to Wi-Fi or IEEE 802.11 (eg, 16 dB gain on Wi-Fi, SNR requirement of -14 dB), And the above paging agreement can meet these requirements.

FIG. 7 is a device level diagram illustrating exemplary elements of the access point 110 and the access terminal 120 of the main RAT system 100 in more detail. As shown, the access point 110 and the access terminal 120 may generally include wireless communication devices (represented by communication devices 730 and 750) for communicating with other wireless nodes via at least one designated RAT, respectively. The communication devices 730 and 750 may be differently configured to transmit and encode signals, and instead are used to receive and decode signals according to a specified RAT (eg, message, indication, information, pilot frequency, etc.).

The communication devices 730 and 750 may include, for example, one or more transceivers (such as corresponding primary RAT transceivers 732 and 752), and in some designs, (optional) co-located secondary RAT transceivers 734 and 734, respectively 754 (for example, corresponding to the RAT used by the contention RAT system 150). As used herein, a "transceiver" may include a transmitter circuit, a receiver circuit, or a combination thereof, but it is not necessary to provide both transmission and reception functions in all designs. For example, when providing full communication is not necessary, low-function receiver circuits (such as radio chips or similar circuit systems that only provide low-level sniffing) can be used in some designs to reduce costs. In addition, as used herein, the term "co-located" (eg, radio unit, access point, transceiver, etc.) may represent one of a variety of arrangements. Such as components in the same housing; components hosted by the same processor; components within a defined distance from each other and / or components connected via an interface (eg, an Ethernet switch), where the interface meets any required component Delay requirements for inter-communication (for example, messaging).

The access point 110 and the access terminal 120 may also generally include a communication controller (by a communication controller) for controlling the operations (eg, orientation, modification, enable, disable, etc.) of their respective communication devices 730 and 750, respectively. 740 and 760). The communication controllers 740 and 760 may include one or more processors 742 and 762, respectively, and one or more memories 744 and 764 respectively coupled to the processors 742 and 762. The memories 744 and 764 may be configured to store data, instructions, or a combination thereof, as on-board cache memory, as separate components, combinations, and the like. The processors 742 and 762 and the memories 744 and 764 may be separate communication elements or may be part of respective host system functions of the access point 110 and the access terminal 120.

It will be understood that the paging scheduler 121 can be implemented in different ways. In some designs, some or all of the functions associated with it may be composed of at least one processor (eg, one or more processors in processor 742), at least one memory (eg, memory in memory 744) One or more memories), at least one transceiver (eg, one or more transceivers of transceivers 732 and 734), or a combination thereof, or otherwise implemented under the guidance of the foregoing. In other designs, some or all of the functions associated with it can be implemented as a series of interrelated function modules.

It will be understood that the paging monitoring manager 122 can be implemented in different ways. In some designs, some or all of the functions associated with it may be composed of at least one processor (eg, one or more processors in processor 762), at least one memory (eg, memory in memory 764) One or more memories), at least one transceiver (eg, one or more transceivers in transceivers 752 and 754), or a combination thereof, or otherwise implemented under the guidance of the foregoing. In other designs, some or all of the functions associated with it can be implemented as a series of interrelated function modules.

Therefore, it will be understood that the elements in FIG. 7 may be used to perform the operations described above with respect to FIGS. 1-6C.

FIG. 8 illustrates an example of a paging scheduling technique discussed at this point (eg, for FIGS. 4A-4C) at an access point, illustrated as a series of interrelated functional modules, according to an embodiment of the present content.性 装置 800。 Sex device 800. In the illustrated example, the device 800 includes a module 802 for obtaining, a module 804 for transmission, a module 806 for transmission, and a module 808 for repeated transmission.

The module 802 for obtaining may be configured to obtain a set of paging messages for transmission to a paging group including a set of UEs associated with different coverage levels. The module 804 for transmission may be configured to transmit a common ePDCCH (for example, 405 of FIG. 4A or 405B of FIG. 4B), which opens a conventional ePDCCH with one or more traditional UEs (eg, MulteFire 1.0 UE). POW extends the duration of POW. The module 806 for transmission may be configured to transmit a paging ePDCCH (for example, 425 of FIG. 4A or 425B of FIG. 4B) after the transmission of the ePDCCH by the module 804 for transmission. The module 808 for repeated transmission may be configured to repeatedly transmit the set of paging messages on a plurality of PDSCH sub-frames according to the paging ePDCCH (for example, 430 of FIG. 4A or FIG. 4B, which may be POW past at 435 Happened after).

FIG. 9 illustrates an example of a paging scheduling technique discussed in this document (eg, for FIGS. 6A-6C) at an access point, illustrated as a series of interrelated functional modules, according to an embodiment of the present content.性 装置 900。 Sex device 900. In the illustrated example, the device 900 includes a module 902 for obtaining, a module 904 for obtaining, and a module 906 for establishing.

The module 902 for obtaining may be configured to: obtain a first set of paging messages for transmission to a first paging group including the first set of UEs (eg, paging group # 0 in FIGS. 6A-6B) . The module 904 for obtaining may be configured to obtain a second set of paging messages for transmission to a second paging group including the second set of UEs (eg, paging group # 1 in FIGS. 6A-6B) . The module 906 for establishing may be configured to establish a non-overlapping paging occasion window (POW) for the first and second paging groups to avoid paging ePDCCH collisions (for example, as shown in FIGS. 6A-6B, by This interleaves the POWs to avoid paging ePDCCH collisions).

The functions of the modules of FIGS. 8-9 can be implemented in various ways consistent with the teachings herein. In some designs, the functions of these modules can be implemented as one or more electronic components. In some designs, the functions of these blocks may be implemented as a processing system including one or more processor elements. In some designs, at least a portion of one or more integrated circuits (eg, ASIC) may be used to implement the functions of the modules. As discussed herein, an integrated circuit may include a processor, software, other related components, or some combination thereof. Therefore, the functions of different modules may be implemented as, for example, different subsets of integrated circuits, different subsets of a set of software modules, or a combination thereof. In addition, it will be understood that a given set of sub-assemblies (eg, a set of integrated circuits and / or software modules) may provide at least a portion of the functionality of more than one module.

In addition, any suitable means may be used to implement the elements and functions represented by FIGS. 8-9 as well as other elements and functions described herein. Such components may also be implemented at least in part using corresponding structures as taught herein. For example, the components described above in connection with the components of the "module for ..." correspond. Thus, in some aspects, one or more of such components may be implemented using one or more of a processor element, an integrated circuit, or other suitable structure as taught herein, including as a calculus law. Those skilled in the art will recognize in the content of this case the algorithms represented by the above text and action sequences that can be represented by pseudo-code. For example, the elements and functions represented in FIGS. 8-9 may include code for performing a LOAD operation, a COMPARE operation, a RETURN operation, an IF-THEN-ELSE loop, and the like.

It should be understood that any reference to elements herein using labels such as "first", "second", etc. does not generally limit the number or order of those elements. Rather, this designation can be used herein as a convenient way to distinguish between two or more elements or between some instances of an element. Therefore, the reference to the first element and the second element does not mean that only two elements can be used here, or that the first element must be in some way before the second element. In addition, a group of elements may include one or more elements unless explicitly stated. In addition, "at least one of A, B, or C" or "one or more of A, B, or C" or "at least one of the group consisting of A, B, and C" used in this specification or claim A form of term means "A or B or C or any combination of these elements." For example, the term may include A, or B, or C, or A and B, or A and C, or A and B and C, or 2A, or 2B, or 2C, and so on.

In view of the above descriptions and explanations, those skilled in the art will understand that all illustrative logical blocks, modules, circuits, and algorithm steps described in combination with the various aspects disclosed in this article can be implemented as electronic Hardware, computer software, or a combination thereof. In order to clearly illustrate the interchangeability between hardware and software, each illustrative component, block, module, circuit, and step has been described as a whole around its function. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Those skilled in the art can implement the described functions in a flexible manner for each specific application, but such implementation decisions should not be interpreted as causing a departure from the scope of the content of this case.

Thus, it will be understood that, for example, a device or any element of a device may be configured (or made operable for or adapted to) provide a function as taught herein. This can be done, for example, by making (e.g., making) a device or element that it will provide the function; by programming the device or element so that it will provide the function; or by some other suitable The use of implementation technology. As an example, an integrated circuit can be made to provide the required functions. As another example, an integrated circuit may be made to support a required function, and then the integrated circuit is configured (for example, through programming) to provide the required function. As yet another example, the processor circuit may execute code to provide the required functionality.

In addition, the methods, sequences, and / or algorithms described in connection with the various aspects disclosed herein can be directly implemented in hardware, in a software module executed by a processor, or in a combination of the two. Software modules can be located in random access memory (RAM), flash memory, read-only memory (ROM), erasable programmable ROM (EPROM), electronic erasable programmable ROM Read memory (EEPROM), scratchpad, hard disk, removable disk, CD-ROM, or any other form of temporary or non-transitory storage medium known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor (eg, cache memory).

Therefore, it will also be understood that, for example, certain aspects of the content of this case may include temporary or non-transitory computer-readable media embodying a method for communication.

Although the foregoing disclosure illustrates various illustrative aspects, it should be noted that various changes and modifications can be made to the illustrated examples without departing from the scope defined by the scope of the appended patent application. The content of this case is not intended to be limited to the specifically illustrated examples. For example, the functions, steps, and / or actions of the method request items in accordance with the aspects of the disclosure described herein need not be performed in any particular order unless otherwise stated. In addition, although some forms may be described or claimed in the singular, the plural is also intended unless explicitly stated to be limited to the singular.

100‧‧‧Main RAT system

110‧‧‧Access Point

120‧‧‧Access terminal

121‧‧‧ Paging Scheduler

122‧‧‧ Paging Monitoring Manager

130‧‧‧ radio link

132‧‧‧ radio link

140‧‧‧Communication media

150‧‧‧ Contention RAT system

152‧‧‧Contention node

300‧‧‧ timing diagram

300B‧‧‧ timing diagram

400‧‧‧ timing diagram

400B‧‧‧ timing diagram

400C‧‧‧ paging process

405‧‧‧box

405B‧‧‧Sub frame

405C‧‧‧block

410‧‧‧PDSCH subframe

410C‧‧‧block

415‧‧‧box

415C‧‧‧block

420‧‧‧box

420C‧‧‧block

425‧‧‧ paging ePDCCH

425B‧‧‧Sub frame

430‧‧‧ Paging PDSCH Repeat

435‧‧‧block

500‧‧‧ paging ePDCCH collision

500B‧‧‧ paging ePDCCH collision

600‧‧‧ timing diagram

600B‧‧‧ timing diagram

600C‧‧‧Paging process

605C‧‧‧block

610C‧‧‧block

615C‧‧‧block

730‧‧‧communication equipment

732‧‧‧Master RAT Transceiver

734‧‧‧ secondary RAT transceiver

740‧‧‧communication controller

742‧‧‧Processor

744‧‧‧Memory

750‧‧‧communication equipment

752‧‧‧Master RAT Transceiver

754‧‧‧ secondary RAT transceiver

760‧‧‧Communication Controller

762‧‧‧Processor

764‧‧‧Memory

800‧‧‧ device

802‧‧‧Modules for obtaining

804‧‧‧Module for transmission

806‧‧‧Module for transmission

808‧‧‧Module for repeated transmission

900‧‧‧ device

902‧‧‧Modules used to obtain

904‧‧‧Modules used to obtain

906‧‧‧Module for establishing

The drawings are provided to help describe the various aspects of the content of the present case, and the drawings are provided for the purpose of illustration only and are not limiting.

FIG. 1 is a system-level diagram illustrating an exemplary wireless network environment.

FIG. 2 illustrates an exemplary frame structure that can be implemented for a primary RAT system on a communication medium to facilitate contention-based access to the communication medium.

FIG. 3A illustrates a timing diagram of a paging procedure, where N _rep = 3, where two PDSCH sub-frames (or PO sub-frames are repeated) carrying a set of paging messages appear in a first TxOP (or, 1 TxOP) , And another PDSCH sub-frame (or the PO sub-frame repeated) carrying the set of paging messages appears in the second TxOP (or, 2 TxOP).

FIG. 3B illustrates the same timing diagram as the timing diagram of FIG. 3A, except that each ePDCCH occupies only a part of the PRB in the corresponding subframe.

FIG. 4A illustrates a timing diagram illustrating a paging procedure using an extended POW according to an embodiment of the present content.

FIG. 4B illustrates the same timing diagram as the timing diagram of FIG. 4A, except that each ePDCCH occupies only a part of the PRB in the corresponding subframe.

FIG. 4C illustrates a paging process according to an embodiment of the content of the present case.

5A illustrates a paging ePDCCH conflict between paging group # 0 and paging group # 1 according to an embodiment of the content of the present case.

5B illustrates a paging ePDCCH conflict between paging group # 0 and paging group # 1 according to another embodiment of the content of the present case.

FIG. 6A illustrates a timing diagram illustrating a non-overlapping POW according to an embodiment of the present content.

FIG. 6B illustrates a timing diagram illustrating a non-overlapping POW according to another embodiment of the content of the present case.

FIG. 6C illustrates a paging process according to an embodiment of the content of the present case.

FIG. 7 is a device-level diagram illustrating exemplary elements of an access point and an access terminal of the primary RAT system of FIG. 1 in more detail.

FIG. 8 illustrates an exemplary paging scheduling technique for implementing the paging scheduling techniques discussed herein (eg, for FIGS. 4A-4C) at an access point represented as a series of interrelated function modules, according to an embodiment of the present content Device.

9 illustrates an exemplary paging scheduling technique for implementing the paging scheduling techniques discussed herein (eg, for FIGS. 6A-6C) at an access point represented as a series of interrelated functional modules, according to an embodiment of the present disclosure. Device.

Domestic hosting information (please note in order of hosting institution, date, and number) None

Information on foreign deposits (please note in order of deposit country, institution, date, and number) None

Claims (22)

A method for uploading a user equipment (UE) on a shared communication medium includes the following steps: obtaining a set of paging messages for transmission to a paging group including a set of UEs associated with different coverage levels; transmitting a Shared Enhanced Physical Downlink Control Channel (ePDCCH), which transmits a shared ePDCCH to open a POW with a duration extended from a traditional paging occurrence window (POW) used by one or more traditional UEs; at the shared A paging ePDCCH is transmitted after the transmission of the ePDCCH; and the set of paging messages is repeatedly transmitted on a plurality of PDSCH sub-frames according to the paging ePDCCH. The method according to claim 1 also includes the following steps: determining a transport block size (TBS) and a repetitive number of transmissions for the set of paging messages based on a worst coverage level UE in the set of UEs, where The repeated transmission transmits the set of paging messages according to the TBS and the repeated number. The method according to claim 1, wherein the shared ePDCCH is transmitted on a first set of physical resource blocks (PRB), and a PDSCH is transmitted on a second set of PRBs in the same subframe . The method according to claim 1, wherein the paging ePDCCH is transmitted on a first set of physical resource blocks (PRB), and a PDSCH is transmitted on a second set of PRBs in the same subframe . The method according to claim 1, wherein one or more PDSCH sub-frames of the plurality of PDSCH sub-frames carrying the repeatedly transmitted set of paging messages are after the traditional POW in the extended part of the POW In transmission. A method for uploading a user equipment (UE) on a shared communication medium includes the following steps: obtaining a first set of paging messages for transmission to a first paging group including a first set of UEs; obtaining paging messages A second set for transmitting to a second paging group including a second set of UEs; and establishing a non-overlapping paging opportunity window (POW) for the first and the second paging group to avoid a paging enhancement Type entity downlink control channel (ePDCCH) collision. The method according to claim 6, wherein the establishing step includes the step of reducing a number of starting paging frames (PF) for each DRX period. The method according to claim 6, further comprising the following steps: transmitting a first paging ePDCCH that schedules the first set of paging messages to the first set of the UE based on the establishment in a first POW; and Based on the establishment, the second POW transmits a second paging ePDCCH that schedules the second set of paging messages to the second set of the UE. The method according to claim 8, wherein the first and second paging ePDCCHs are offset from each other to avoid the paging ePDCCH collisions. The method according to claim 8, wherein the first paging ePDCCH is transmitted on a first set of physical resource blocks (PRB), and a PDSCH is on a second set of PRBs in the same subframe Transmission. The method according to claim 8, wherein the second paging ePDCCH is transmitted on a first set of physical resource blocks (PRB), and a PDSCH is on a second set of PRBs in the same subframe Transmission. An apparatus configured to call a user equipment (UE) on a shared communication medium, comprising: at least one processor coupled to at least one transceiver and configured to: obtain a set of paging messages for transmission to a set including: A paging group of a set of UEs associated with different coverage levels; transmitting a shared enhanced physical downlink control channel (ePDCCH), which transmits a shared ePDCCH with a legacy used from one or more conventional UEs A duration POW with a paging occurrence window (POW) extension; transmitting a paging ePDCCH after the transmission of the shared ePDCCH; and repeatedly transmitting the set of paging messages on a plurality of PDSCH sub-frames according to the paging ePDCCH. The apparatus according to claim 12, wherein the at least one processor is also configured to: determine a transport block size (TBS) and transmission for the set of paging messages based on a worst coverage level UE in the set of UEs A number of repetitions, wherein the at least one processor is configured to repeatedly transmit the set of paging messages according to the TBS and the number of repetitions. The device according to claim 12, wherein the shared ePDCCH is transmitted on a first set of physical resource blocks (PRB), and a PDSCH is transmitted on a second set of PRBs in the same subframe . The device according to claim 12, wherein the paging ePDCCH is transmitted on a first set of physical resource blocks (PRB), and a PDSCH is transmitted on a second set of PRBs in the same subframe . The device according to claim 12, wherein the one or more PDSCH sub-frames of the plurality of PDSCH sub-frames carrying the repeatedly transmitted set of paging messages are after the traditional POW in the extended part of the POW In transmission. An apparatus configured to call a user equipment (UE) on a shared communication medium includes: at least one processor coupled to at least one transceiver and configured to: obtain a first set of paging messages for transmission To a first paging group including a first set of UEs; obtaining a second set of paging messages for transmission to a second paging group including a second set of UEs; and for the first and the first The second paging group establishes a non-overlapping paging occasion window (POW) to avoid a paging enhanced physical downlink control channel (ePDCCH) collision. The apparatus according to claim 17, wherein the at least one processor is configured to establish the non-overlapping POWs by reducing an amount of a starting paging frame (PF) for each DRX period. The apparatus according to claim 17, wherein the at least one processor is configured to: transmit a first page of the first set of paging messages to a first set of the UE based on the establishment in a first POW ePDCCH; and a second paging ePDCCH that schedules the second set of paging messages to the second set of the UE based on the establishment in a second POW. The apparatus according to claim 17, wherein the first and second paging ePDCCHs are offset from each other to avoid the paging ePDCCH collisions. The device according to claim 17, wherein the first paging ePDCCH is transmitted on a first set of physical resource blocks (PRB), and a PDSCH is on a second set of PRBs in the same subframe Transmission. The device according to claim 17, wherein the second paging ePDCCH is transmitted on a first set of physical resource blocks (PRB), and a PDSCH is on a second set of PRBs in the same subframe Transmission.